clusterip and nodeport diff
ClusterIP and NodePort are two types of services in Kubernetes that serve different purposes and have different characteristics.
ClusterIP:
Purpose: ClusterIP services expose an internal IP address within the Kubernetes cluster, which is accessible only from within the cluster.
Example: Suppose you have a set of microservices in your Kubernetes cluster, and one of them is a database service. You want other microservices within the cluster to communicate with the database service, but you don't want the database to be accessible from outside the cluster. In this case, you would create a ClusterIP service for the database, allowing other microservices to communicate with it using its internal IP address.
NodePort:
Purpose: NodePort services expose a service on a specific port on all nodes (VMs) in the cluster. This makes the service accessible from outside the cluster by accessing any node's IP address and the specified port.
Example: Let's say you have a web application deployed in your Kubernetes cluster, and you want users from outside the cluster to access it. You can create a NodePort service for the web application, which will open a specific port (e.g., 30000-32767) on all nodes in the cluster. Users can then access the web application by using any node's IP address and the assigned port.
Comparison:
Accessibility: ClusterIP services are only accessible from within the cluster, whereas NodePort services are accessible from outside the cluster.
IP Address: ClusterIP services have an internal IP address within the cluster, while NodePort services use the IP address of the nodes in the cluster.
Use Case: ClusterIP is suitable for internal communication between components within the cluster, while NodePort is used when you need to expose a service to external clients.
In summary, ClusterIP services are used for internal communication within the cluster, while NodePort services are used to expose services to external clients accessing the Kubernetes cluster